I posted this awhile back but really did not get any feedback. A while back I found a large buildup of oily sludge in the intake and traced it back as coming from a malfunctioning PDC. At the time none of the local autoparts places could get a new PDC so I decided to eliminate it. A regular ol' chrome valve cover breather will slip right into place on the existing grommet on the passenger side valve cover. The problem is it pukes engine oil out of it. Since the engine seems to run fine otherwise, and this is an issue on high compression gas engines, I assumed this was a normal issue with the diesel engine. I then tried a valve cover breather that is enclosed with a outlet tube....of course this made the issue worse at it directed the oil spray. I then added a long hose to the outlet to direct the oil but it still makes a mess.....so now...... I stopped by Jeg's this weekend and they have a valve cover breather that is listed as having an oil seperator built into it. They also have replacement grommets with various shapes/styles of "baffles" built in with the intent of limiting oil passage into the breather. Has anybody tried any of these devices to replace the PDC and limit the oil blow-by?